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Dyfyniad Arddull ChicagoKranz,Jurgen, and rotem,joseph. Experimental Techniques in Plant Diseases Epidemiology. New York: Spriger-verlag, 1987.
Dyfyniad MLAKranz,Jurgen, and rotem,joseph. Experimental Techniques in Plant Diseases Epidemiology. Spriger-verlag, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.